* Added wxMMedia in the repository so people interrested in it can work on it

* WARNING! It is quite unstable on Windows and it doesn't work on Linux for
  the moment because I didn't finish fixing the CODEC stream.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@975 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

utils/wxMMedia/sndfrmt.h

@@ -0,0 +1,119 @@
+#ifndef __SNDFRMT_H__
+#define __SNDFRMT_H__
+
+#ifdef __GNUG__
+#pragma interface
+#endif
+
+#include <wx/object.h>
+
+class wxSndBuffer;
+
+// Standard Microsoft types (why change ?)
+#define WXSOUND_PCM   0x0001
+#define WXSOUND_ADPCM 0x0002
+#define WXSOUND_ALAW  0x0006
+#define WXSOUND_ULAW  0x0007
+
+class wxSoundCodec;
+class wxSoundDataFormat {
+ public:
+  wxSoundDataFormat();
+  ~wxSoundDataFormat();
+
+  void SetSampleRate(int srate) { m_srate = srate; }
+  void SetChannels(int channels);
+  void SetStereo(bool on);
+  void SetCodecNo(int no);
+  void SetCodecCreate(bool create) { m_codcreate = create; }
+
+  int GetSampleRate() const { return m_srate; }
+  int GetChannels()  const { return m_channels; }
+  bool GetStereo() const { return (m_channels == 2); }
+  int GetCodecNo() const { return m_codno; }
+
+  wxSoundCodec *GetCodec();
+
+  wxSoundDataFormat& operator =(const wxSoundDataFormat& format);
+  bool operator ==(const wxSoundDataFormat& format) const;
+  bool operator !=(const wxSoundDataFormat& format) const
+        { return !(operator ==(format)); }
+
+  /// PCM format
+  void SetByteOrder(int order);
+  void SetSign(int sign);
+  int GetByteOrder() const { return m_byteorder; }
+  int GetSign() const { return m_sign; }
+
+  void SetBps(int bps);
+  int GetBps() const { return m_bps; }
+
+ protected:
+  void CodecChange();
+
+ protected:
+  int m_srate, m_bps, m_channels, m_codno;
+  int m_byteorder, m_sign;
+  bool m_codchange, m_codcreate;
+  wxSoundCodec *m_codec;
+};
+
+class wxSoundCodec : public wxObject, public wxStreamBase {
+  DECLARE_ABSTRACT_CLASS(wxSoundCodec)
+ public:
+  wxSoundCodec();
+  virtual ~wxSoundCodec();
+
+  void SetIOBuffer(wxSndBuffer *sndbuf) { m_io_sndbuf = sndbuf; }
+  size_t Available();
+
+  void InitIO(const wxSoundDataFormat& format);
+  void InitMode(int mode);
+  void ExitMode();
+
+  inline void SetInStream(wxStreamBuffer *s)
+          { m_in_sound = s; }
+  inline void SetOutStream(wxStreamBuffer *s)
+          { m_out_sound = s; }
+  inline wxStreamBuffer *GetInStream() const { return m_in_sound; }
+  inline wxStreamBuffer *GetOutStream() const { return m_out_sound; }
+
+  inline bool Good() const { return (m_in_sound->Stream()->LastError() == wxStream_NOERROR) && (m_out_sound->Stream()->LastError() == wxStream_NOERROR); }
+
+  virtual size_t GetByteRate() const = 0; 
+  virtual wxSoundDataFormat GetPreferredFormat(int codec = 0) const = 0; 
+
+  virtual void Decode() = 0;
+  virtual void Encode() = 0;
+
+  static wxSoundCodec *Get(int no);
+
+ protected:
+  void CopyToOutput();
+
+  unsigned short Convert8_16(unsigned char s) { return (s & 0xff) << 8; }
+  unsigned char Convert16_8(unsigned short s) { return (s & 0xff00) >> 8; }
+
+  bool ChainCodecBefore(wxSoundDataFormat& cod_to);
+  bool ChainCodecAfter(wxSoundDataFormat& cod_to);
+
+  // -------------
+  // wxStream part
+  // -------------
+  size_t OnSysWrite(const void *buffer, size_t bsize);
+  size_t OnSysRead(void *buffer, size_t bsize);
+
+ protected:
+  wxSndBuffer *m_io_sndbuf;
+  wxSoundDataFormat m_io_format;
+  wxStreamBuffer *m_in_sound, *m_out_sound;
+  wxSoundCodec *m_chain_codec;
+  bool m_init, m_chain_before;
+
+  enum {
+    ENCODING = 0,
+    DECODING
+  } m_mode;
+};
+
+#endif